I'm in the midst of mission 2...as Lian Xing, I'm trying to bust out of the military compound. I've made it to the second checkpoint, where there is the sliding glass. According to every FAQ I've read, I'm supposed to exit the door on the other side of the glass (near where the dead man is) and take one of the paths at the door...
But I can't get through the door. I can't open the door. I've tried numerous times, but I can't seem to find a way out of that room. I've tried to exit the room and head down the hallway from where I came from, but by the time I reach half way, and MP shoots me!
I found the switch that opens up the glass. I've been able to get into the room with the dead man, but I can't find my way out of that room. The door there is the only way to get to where my uniform is; and I need that.
Here (computerandvideogames.com) and here (pcgameworld.com) are interviews with the lead designer for the game. He talks about some of the new content (which will eventually be available for download via X-Box live, so fret not, X-boxers)